Piston and piston-rod for internal-combustion engines.



PATBNTED JUNE 6. 1905.

, A.. M. BROWN. PISTON AND PISTON ROD FOR'INTBRNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. 20, 1904.

-. Witnesses,

Patented June 6, 1905.

PATENT OFFICE.

ARTHUR MORLEY BROWN, OF NGARUAWAHIA, NEW ZEALAND.

PISTON AND PISTON-ROD FOR INTERNAL-COMBUSTION ENGINES.

, SPECIFICATION forming part of Letters Patent No. 791,871, dated. June 6, 1905.

Application filed September 20, 1904. Serial No. 225,273-

To aIZZ- whom it may concern.-

Be it known that LA THUTRMORLEYBRO N, a subject of the King of Great Britain, residing at Ye Kowhai, Ngaruawahia, Auckland, in the Colony of New Zealand, have invented certain new and useful Improvements in Pistons and Piston-Rods for Internal- Combustion Engines, of which the following is a specification.

This invention relates to a double-ended piston for internal-combustion engines and the combination with said piston of a piston-rod and an appliance hereinafter described, whereby the said piston and rod can be efi'iciently cooled by water, compressed air, or other cooling agent.

With the foregoing and other objects in view the invention consists of the novel construction, combination, 'and arrangement of parts hereinafter more specifically described, illustrated in the accompanying drawings, forming a part of this specification, and wherein is shown the preferred embodiment of the invention; but it is to be understood that changes, variations, and modifications can be made which come properly within the scope of the claims hereunto appended.

Referring to the drawings, wherein like reference characters denote corresponding parts throughout the several views, Figure l illustrates in longitudinal section a piston constructed in accordance with this invention. Fig. 2 illustrates in longitudinal section a modified form of piston constructed in accordance with this invention and drawn to a larger scale than Fig. 1. Fig. 3 is a cross-section on the line as y, Fig. 2; and Fig. 4 is a cross-section of one of the sleeves of the piston surrounding the piston-rod.

The piston constructed in accordance with this invention is double-ended and hollow and formed of two sections or halves a a and the said sections or halves a; a are joined together in a manner as hereinafter referred to, The piston is illustrated working in the cylinder Z of an internal-combustion engine provided wits inlet and exhaust ports of the ordinary kin b is a tubular projection or sleeve on the outer end of the half a of the piston, and b is a similar tubular projection or sleeve on the outer end of the other half a of the piston.

The said sleeves b b surround the-piston-rod 6 within and extend a little beyond each end of the cylinder Z, as represented in the drawings. It will be seen that the piston-rod 6 extends through the box-like double-ended piston a a and the sleeves b 6 also project through packed glands p p at each end of the cylinder Z, as represented in Fig. 1. One end of the piston-rod e is attached to the main cross-head f by the lock-nuts f and the other or tail end of the piston-rod e is attached to the slipper-guide gby thelock-nuts at 9 the said slipper-guide forming a support for the tail end of the piston. In some cases the slipper-guide 9 may be dispensed with and the gland in the cylinder-cover be used to support the tail end of the piston-rod, and instead of the pistonrod being supported in the way described and represented the sleeves 6 Z7 may be similarly supported. It will be seen by an examination of Fig. 1 that the cylindrical projections or sleeves Z) 6 of the halves of the piston open into the said piston and are of such a diameter that there is left between them and the pistonrod an annular space, way, or channel to permit of the circulation of the cooling liquid or agent through them and around the piston-rod and also through the hollow piston. Each of the sleeves, as represented in the cross-section, Fig. 4, is provided with longitudinal ribs (marked in) to insure their true alinement and concentricity with the piston-rod and also to direct the flow of the cooling liquid in the way or channel between the piston-rod and pistonsleeves. A passage at j is made at each end of the piston-rod e, which passages open into the annular way or channel between the sleeves and piston-rod to convey the cooling agent. (See Fig. 1.) The cooling liquid or agent for cooling the piston and piston-rod is introduced at either end of the, piston-rod in connection with the passage and discharged at the other end or at either end of the sleeves in any convenient manner.

The halves of the box-like piston (00?, both of the arrangement Fig. 1 and the modified arrangement, Fig. 2, are joined together in the following way and as will be best seen internal ring q on the last-mentioned halfpiston to form a concentric bearing for both halves. Between the nearly-abutting edges of the two halves of the piston a ring of guttapercha or other packing r is inserted to form a liquid or air-tight joint, the joint being preserved tight by means of the lock-nuts f 9 screwed on each end of the piston-rod and made to bear against the outer end of each sleeve. The halves of the piston are thus securely bound together.

t t is a circular boss cast on each half of the piston and secured to the same by ribs marked 8. The boss t transmits the strain to the projection or collar a on the piston-rod e, which collar or projection it receives the strain due to the load on the piston.

In a modified arrangement of my invention, as represented in Figs. 2 and 3, one sleeve only is combined with the box-like piston, the piston-rod within the single sleeve projecting through the cylinder-cover only. In other respects this modified arrangement does not differ essentially from the corresponding parts of the first-described arrangement, and similar parts are marked with the same letters of reference.

My invention may be applied to any internal-combustion engine having any number of cylinders and working on any of the wellknown cycle principles.

'Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two abutting sections each having a sleeve projecting therefrom, a piston-rod extending through said sleeves and head and suitably connected with the head, and means mounted upon the pistonrod for securing the sections together.

2. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two abutting sections, each having a sleeve projecting therefrom, a piston -rod extending through said sleeves and head and suitably connected with the head, and means mounted upon the pistonrod and engaging the sleeves for securing the sections together.

3. A piston for internalcombustion engines, embodying a reciprocatory double ended hollow head formed of two abutting sections, each having a sleeve projecting therefrom, a piston-rod extending through said sleeves and head and suitably connected with the. head, means mounted upon the piston-rod for securing the sections together, and means for circulating a cooling medium through said head and sleeves, thereby cooling the head, sleeves and piston-rod.

A. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two abutting sections, each having a sleeve projecting therefrom, a piston-rod extending through said sleeves and head and suitably connected with the head, means mounted upon the piston-rod and engaging the sleeves for securing the sections together, and means for circulating a cooling medium through said sleeves and head, thereby causing the cooling of the head, sleeves and rod.

5. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two sections, each of said sections provided with a sleeve projecting therefrom and further provided with a boss, a collar carried by the rod and adapted to engage the said bosses,'and a piston-rod extending through said sleeves and bosses and suitably connected therewith.

6. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two sections, each of said sections provided with a sleeve projecting therefrom and further provided with a boss, a collar carried by the rod and adapted to engage the said bosses, a pistonrod extending through said sleeve and bosses and suitably connected therewith, and means for circulating a cooling medium through said sleeves and head, causing thereby the cooling of the said head, sleeves and piston-rod.

7. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two sections, each of said sections provided with a boss, a sleeve projecting from one of said sections, a collar carried by the rod and adapted to abut against said bosses, a piston-rod extending through said sleeves and bosses, and means mounted upon the piston-rod for connecting it with said head and retaining the sections of the head together.

8. A piston for internal-combustion engines, embodying a reciprocatory doubleended hollow head formed of two sections, each of said sections provided with a boss, a sleeve projecting from one of said sections, a collar carried by the rod and adapted to abut against said bosses, a piston-rod extending through said sleeves and bosses, means mounted upon the piston-rod for connecting it with said head and retaining the sections of the head together, and means for circulating a cooling medium through said sleeve and head, causing thereby the cooling of the head, sleeves and rod.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

ARTHUR MORLEY BROWN.

lrVitnesses:

ALFRED NUTTING, R. F. WILLIAMs. 

